Press for dental flasks



(No Modem 7 PRESS FOR DENTAL PLASKS, 6:0. I No. 363,152. Patented May17, 1887.

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UNITED STATES ATENT rrrca,

MYRON M. MAINE, OF SOUTH MANCHESTER, CONNECTICUT.

PRESS FOR DENTAL FLASKS, 80G.

SPECIFICATION forming part of Letters Patent NO. 363,152, dated May 1'7,1887.

Application filed July 17, 1884.

To aZZ whom it may concern.-

Be it known that I, MYRON M. MAINE, of South Manchester, in the countyof Hartford and State of Connecticut, have invented cer tain new anduseful Improvements in Presses for Dental Flasksand the Like; and Idohereby declare that the following is a full, clear,

, and ex act description, whereby a person skilled p: ess and theflaskwhen the material forming the plate has been softened and spreadand the flask closed.

The object of my improvement is to provide I a collapsible press forholding a dental flask with a yielding pressure, and so constructed toenable the operator to apply the pressure to any particular part and toany degree that may be desired, and while accomplishing these results itshall be a press that is cheaper in construction and more readilydismounted after use than prior devices of this class; and myimprovement consists of a press in which the base and the platen areboth made of thin spring metal, and are curved toward each other, sothat a greater degree of adjustment is obtained than can be obtained byany prior device, the base and platen being connected to each other ateach end by standards having one end threaded and bearing nuts fittingthe threads, whereby the distance between the base and platen isdetermined, as more particularly hereinafter described, and pointed outin the claim.

In the accompanying drawings, the letter a denotes a dental flask ofordinary material and construction; I), the lower section; 0, theringsection, and d the cover, the sections and the cover being when puttogether held against lateral displacement by means of the projectinglugs c d, which fit into dovetailed sockets in the adjacent parts of theflask. e

denotes my improved press as a whole, f the base, and g the platen,which are each formed of strips or plates of comparatively thin metal,preferably steel, curving toward each other in the center, and united attheir outer ends by means of the screw-threaded standards h. Each ofthese standards has a broadened head, It, oranysimilar means forpreventing it from slipping through a hole in the basc-platef, and bearsa threaded nut, preferably of the butterfly pattern, with wings thatenable it to be readily turned on the threaded stem of the stand, so asto apply the pressure to the side of the platen g opposite to thebasc-plate. The platen and base-plate are preferably of the simple form,as above described; but, if itis desirable, they may be made each with aseries ofarms extending'fron'i a common center.

When the press is not in use, the 'nuts can be unscrewed from thestandards and the platen and baseremoved, so as to be packed in a verysmall space, and this isaceomplishcd without the aid of any tools.

In using my improved press the flask containing the roughly formed tooth-plate' is placed between the base-plate and platen and pressure applieduntil the base and platen are nearly flat, as illustrated in Fig. 2. If,on. account of any peculiarity of the jaw to be fitted, owing to aparticularly thin alveolar ridge or other weak point as one or moreremaining and projecting teeth, it is desirable to apply the pressureupon the flask at one side of their center, the nut on one of thestandards is run down to a lower point than on the other, as indicatedby the dotted outa by the press, and the vulcanization of theplate thengoes on in the usual manner.

The standards are so supported in the base plate as to prevent theirturning with the nuts when the latter are used to clam p the flask inthe press. This may be done by making the standards angular in sectionand making the ,opening in the base to fit that angular outline.

The main advantages of my improvement are the avoidance of the danger ofbreaking delicate portions of the cast, spreading or breaking the blocksof teeth, and breaking down the arch of the plate, which are commonresults in the use of devices prior to myinvention.

I am aware that it is not new to provide a dental-flask press withscrew-threaded standards, having nuts fitting such standards, wherebythe parts are secured together, as such adeviceisshown in patent to J.D. Heigcs, No. 170,731, of December 7, 1875; and I am also aware that itis not new to provide a dental flask with a press having a platen ofspring metal, as such is shown in patent to 6.

In combination With a partible dental flask,

a press consisting of a thin spring-metal base that curves upward, andis perforated at its ends to receive the standards,and athin springmetalplaten curving toward the base, and

also perforated at its ends, so as to slide upon I the standards, thestandards joining the platen and the base, and provided at one end witha broadened head and at the other with a thread, on which are fitted theadjustingnuts, all substantially as described, and for the purpose setforth.

MYRON M. MAINE. YVitnesscs:

CHAS. L. BURDETT, E. F. DIMOOK.

